<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item,index) in levelList" :key="item.path">
        <span v-if=" index!=0 ||index == levelList.length - 1" class="no-redirect">{{ item.meta.title }}</span>
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script lang="ts" setup>
import {
  ref,
  inject,
  reactive,
  onMounted,
  computed,
  watch,
  nextTick,
  getCurrentInstance,
  ComponentInternalInstance
} from 'vue';
import {useStore} from "vuex";
import {useRoute,useRouter} from "vue-router";
const { proxy } = getCurrentInstance() as ComponentInternalInstance
let store: any = useStore();
let  route: any = useRoute();
let router: any = useRouter();
let levelList=ref([])
const getBreadcrumb = () => {
  // only show routes with meta.title
  let matched = route.matched.filter(item => item.meta && item.meta.title)
  const first = matched[0]
  if (!isDashboard(first)) {
    matched = [{ path: '/index', meta: { title: '首页' }}].concat(matched)
  }
  levelList.value =matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
  proxy!.$forceUpdate()
}
watch(() => route.path, (newPath, oldPath) => {
  // if you go to the redirect page, do not update the breadcrumbs
  if (route.path.startsWith('/redirect/')) {
    return
  }
  getBreadcrumb()
});
const isDashboard = (first:any) => {
  const name = first && first.name
  if (!name) {
    return false
  }
  return name.trim() === 'Index'
}
const handleLink = (item:any) => {
  const { redirect, path } = item
  if (redirect) {
    router.push(redirect)
    return
  }
  router.push(path)
}
onMounted(()=>{
  nextTick(()=>{
    getBreadcrumb()
  })

})

</script>

<style lang="scss" scoped>
  .app-breadcrumb.el-breadcrumb {
    display: inline-block;
    font-size: 14px;
    line-height: 50px;
    margin-left: 8px;

    .no-redirect {
      color: #97a8be;
      cursor: text;
    }
  }
</style>